| 
                       Delaware 
                     | 
                    
                       1-6770 
                     | 
                    
                       25-0790410 
                     | 
                  ||
| 
                       (State
      or other 
                     | 
                    
                       (Commission
      File 
                     | 
                    
                       (IRS
      Employer 
                     | 
                  ||
| 
                       jurisdiction 
                     | 
                    
                       Number) 
                     | 
                    
                       Identification
      No.) 
                     | 
                  ||
| 
                       of
      incorporation) 
                     | 
                    
| 
                               8285
      Tournament Drive 
                             | 
                            ||||
| 
                               Suite
      150 
                             | 
                            ||||
| 
                               Memphis,
      Tennessee 
                             | 
                            
                               38125 
                             | 
                          |||
| 
                               (Address
      of principal 
                             | 
                            
                               Zip
      Code 
                             | 
                          |||
| 
                               executive
      offices) 
                             | 
                            
| 
               ¨ 
             | 
            
               Written
      communications pursuant to Rule 425 under the Securities Act (17 CFR
      230.425) 
             | 
          
| 
               ¨ 
             | 
            
               Soliciting
      material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
      240.14a-12) 
             | 
          
| 
               ¨ 
             | 
            
               Pre-commencement
      communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR
      240.14d-2(b)) 
             | 
          
| 
               ¨ 
             | 
            
               Pre-commencement
      communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR
      240.13e-4(c)) 
             | 
          
| 
                   MUELLER
      INDUSTRIES, INC. 
                 | 
              ||
| 
                   By: 
                 | 
                
                   /s/
      Kent A. McKee 
                 | 
              |
| 
                   Name: 
                 | 
                
                   Kent
      A. McKee 
                 | 
              |
| 
                   Title:       
                 | 
                
                   Executive
      Vice President 
                 | 
              |
| 
                   and
      Chief Financial Officer 
                 | 
              ||
| 
                 Exhibit No. 
               | 
              
                 Description 
               | 
            |
| 
                 99.1 
               | 
              
                 Press
      release, dated April 21,
2009. 
               |